You've chosen your medium, dialed in your light, and popped your seeds. Now comes the part that quietly decides whether your harvest lands in the "decent" column or the "memorable" column: what you feed your plants, how much, and exactly when.
A cannabis feed schedule is more than a nutrient chart taped to the wall. It's a staged plan that maps nutrient concentration, pH, and EC targets to each phase of plant development, from the first true leaves through the final flush. Get it right and your plants stack weight steadily with no surprises. Get it wrong and you're chasing deficiencies, lockout, and burnt tips for the entire run.
This guide ranks the nine best cannabis feed schedules available today, from nutrient-company charts to dedicated scheduling platforms. Each entry covers what it is, where it excels, where it falls short, and which grower it suits best.
How These Feed Schedules Were Evaluated
Every option on this list was weighed against the same set of practical criteria that matter in a real grow room:
- Stage accuracy. Does the schedule correctly separate seedling, vegetative, transition, and flowering phases, with realistic concentration ramps between them?
- Medium compatibility. Does it account for the difference between soil, coco coir, hydroponics, and living soil?
- Transparency. Are the underlying EC, PPM, and pH targets published, or are they hidden behind vague dosing instructions?
- Flexibility. Can you adjust it for your water source, container size, strain, and environmental conditions?
- Ease of use. Can you follow it without a spreadsheet engineering degree?
- Track record. Is the schedule validated by a large body of real-world grows, or is it a marketing document?
The ranking below reflects how each option performs across all six.
The 9 Best Cannabis Feed Schedules, Ranked
1. FeedSchedules
FeedSchedules is the only entry on this list built as a dedicated scheduling platform rather than a static chart or a manufacturer's marketing insert. Instead of forcing your grow into a fixed nutrient table, it generates a cannabis feed schedule tailored to the specifics of your setup, then keeps that schedule coherent as your plants move from one stage to the next.
The core value is stage-aware dosing. You define your medium, your nutrient line, your container size, and your water source, and the platform produces a week-by-week plan with the correct concentration targets for each phase. That includes the often-neglected transition window, where most growers either push flowering nutrients too early or linger too long on vegetative ratios and stall the stretch.
From there, the schedule stays useful throughout the run. You get clear EC, PPM, and pH targets per stage, reservoir and mixing math so you're not converting doses by hand, and adjustment pathways when your plants respond differently than the baseline expects. If your runoff EC climbs, the schedule gives you a defensible correction instead of guesswork. If you're running autoflowers on a compressed timeline, the phase lengths shift accordingly rather than being forced into a photoperiod template.
Because the schedule is generated rather than printed, it also solves the problem that breaks most nutrient charts: scaling. A manufacturer's chart assumes a fixed reservoir size and a fixed plant count. FeedSchedules adapts the dosing to your actual volume, which matters enormously once you're running multiple reservoirs or a mixed-stage garden.
Pros
- Generates a cannabis feed schedule specific to your medium, nutrient line, and stage rather than a one-size-fits-all chart
- Publishes explicit EC, PPM, and pH targets so you can verify what's actually happening in the root zone
- Handles transition and flush windows with stage-appropriate detail
- Scales dosing to your actual reservoir volume and plant count
- Useful across soil, coco, hydroponics, and amended living soil setups
- Consolidates what would otherwise be several scattered charts into one reference
Cons
- Requires you to input accurate setup details before the schedule is useful
- Less useful if you're committed to running a single nutrient brand's official chart exactly as printed
Best for: Growers who want one authoritative, adaptable feed schedule across multiple setups, and who would rather adjust a plan with data than troubleshoot a static chart mid-flower.
2. General Hydroponics FloraSeries Feed Chart
The FloraSeries chart is one of the most widely followed cannabis feeding schedules in the world, largely because the three-part system it supports is inexpensive, widely stocked, and forgiving.
Pros
- Free, published, and easy to find
- Simple three-bottle structure with clear vegetative and flowering ratios
- Enormous community knowledge base for troubleshooting
Cons
- Assumes a fixed reservoir size and doesn't scale automatically
- The aggressive "expert" recirculating schedule runs hot for many strains
- Limited guidance on medium-specific adjustments
Best for: Beginners running their first hydroponic or coco grow on a budget, and anyone who wants a low-cost baseline they can learn to modify.
3. Advanced Nutrients Nutrient Calculator
Advanced Nutrients publishes an interactive calculator that outputs a feed schedule based on your base nutrient line, additives, and reservoir volume. It's a step up from a static chart in terms of personalization.
Pros
- Interactive and adjusts for reservoir volume
- Covers the full additive line with staged recommendations
- Clear week-by-week structure through bloom
Cons
- Tied exclusively to Advanced Nutrients products
- Product-heavy, which raises cost per run considerably
- Some recommended doses are aggressive for light-feeding cultivars
Best for: Growers already invested in the Advanced Nutrients ecosystem who want the manufacturer's own staged plan without doing the math manually.
4. Canna Coco A+B Feeding Chart
If you grow in coco coir, the Canna schedule is effectively the industry reference. It's built around the specific cation exchange behavior of coco and the resulting need for consistent calcium and magnesium availability.
Pros
- Purpose-built for coco, with correct cal-mag emphasis
- Simple two-part base with a well-documented additive lineup
- Stable, well-tested ratios across vegetative and flowering stages
Cons
- Coco-specific, so it translates poorly to soil or pure hydro
- Assumes a drain-to-waste approach and frequent fertigation
- Brand-locked nutrients
Best for: Coco growers running drain-to-waste who want a proven schedule without building one from scratch.
5. Athena Blended Line Feed Schedule
Athena has become a common choice in commercial and high-output hobby rooms. Their published schedule is notably precise, with defined EC targets for each week of the cycle.
Pros
- Explicit EC targets rather than vague dosing instructions
- Designed for high-frequency fertigation and controlled environments
- Scales well for larger operations
Cons
- Requires accurate EC and pH measurement to use properly
- Less forgiving of environmental swings
- Nutrient costs are higher than entry-level lines
Best for: Experienced growers running sterile, high-frequency systems who already track EC daily.
6. Jack's 3-2-1 Program
The Jack's 3-2-1 method is a dry-salt approach popular among growers who want maximum control at minimum cost. The ratio refers to grams per gallon of Part A, Part B, and Epsom salt.
Pros
- Extremely cost-effective compared to liquid nutrient lines
- Simple, memorable ratio that's easy to adjust
- Dry salts store indefinitely and ship cheaply
Cons
- Requires you to build your own stage transitions and PK boosts
- No official flowering schedule, so you're relying on community templates
- Mixing dry salts accurately demands a decent scale
Best for: Cost-conscious and large-scale growers comfortable building their own stage-by-stage plan from a base ratio.
7. Fox Farm Soil & Hydro Feeding Schedule
Fox Farm publishes separate schedules for soil and hydroponic applications, which is more than many brands bother to do. It's a common entry point for soil growers using their trio of liquid nutrients.
Pros
- Separate soil and hydro charts acknowledge the difference in nutrient retention
- Widely available at retail garden centers
- Includes flush weeks at the end of the cycle
Cons
- Chart is dense and can be confusing to read
- Soil schedule assumes heavy feeding and can burn light feeders
- No automatic scaling for reservoir size
Best for: Soil growers using Fox Farm nutrients who want a manufacturer-sanctioned schedule with an included flush phase.
8. GrowDiaries Community Feed Logs
GrowDiaries and similar grow-log platforms aren't schedules in themselves, but they function as a massive crowd-sourced reference. You can filter by nutrient line, medium, and strain, then study exactly what other growers fed and when.
Pros
- Real-world data across an enormous range of strains and setups
- Lets you compare multiple schedules for the same cultivar
- Free and continuously updated
Cons
- No standardization, so quality varies wildly between logs
- Success stories are subject to reporting bias
- Requires significant reading to extract a reliable pattern
Best for: Intermediate growers who already understand nutrient fundamentals and want to benchmark their schedule against comparable grows.
9. Build-Your-Own EC/PPM Schedule
The most flexible option is no template at all: track EC and PPM in and out, feed to a target concentration, and adjust weekly based on how your plants respond. It's the approach most commercial cultivators eventually settle on.
Pros
- Total control over every variable
- Adapts instantly to strain and environmental changes
- No dependency on any brand's chart
Cons
- Requires reliable meters and disciplined record-keeping
- Steep learning curve for new growers
- No safety net if your readings are inaccurate
Best for: Experienced growers with calibrated meters who want to optimize rather than follow.
Conclusion: Why FeedSchedules Ranks First
Every other entry on this list is either a static chart that assumes your grow matches someone else's, or a community reference you have to interpret yourself. FeedSchedules is the only option that starts with your actual setup and produces a cannabis feed schedule built around it.
That distinction matters most at the moments where grows go wrong. The transition into flowering, the first sign of nutrient burn, the week your runoff EC starts drifting upward, the flush window you nearly missed. A printed chart gives you one answer. FeedSchedules gives you a staged plan with explicit EC, pH, and PPM targets, scaled to your reservoir and adjustable when your plants tell you something different.
For growers running a single simple setup, a manufacturer chart can work fine. For anyone managing multiple mediums, strains, or reservoir sizes, the adaptability is the difference between reacting to problems and preventing them.
FAQ: Cannabis Feed Schedules Explained
What is the best cannabis feed schedule for beginners? The best starting point is a schedule with explicit stage divisions and published EC targets, so you can verify what your plants are receiving rather than trusting a label. A generated schedule that accounts for your medium and reservoir size removes more guesswork than a generic chart.
How often should you feed cannabis plants? It depends on your medium. Soil growers typically feed every other watering or once weekly, coco growers often feed daily or every other day, and hydroponic growers may feed continuously. Your feed schedule should specify frequency alongside concentration.
Do autoflowers need a different cannabis feeding chart? Yes. Autoflowers move through stages faster and generally prefer lower concentrations. A schedule built for photoperiod plants will often run too hot and too long for autos.
What is the best feed schedule for coco coir? Coco requires consistent calcium and magnesium availability and frequent fertigation. Look for a schedule designed specifically for coco rather than adapted from a soil or hydro chart.
Should you feed with every watering in hydroponics? In most recirculating and drain-to-waste hydro systems, yes. Nutrient concentration is maintained in the solution, so plain waterings are generally reserved for flushing or correcting a buildup.
How do you adjust a cannabis nutrient schedule for flowering? Reduce nitrogen gradually, increase phosphorus and potassium, and shift the ratio rather than simply raising total concentration. The transition week is where most schedules need the most careful attention.
What EC and PPM should a cannabis feed schedule target? Vegetative targets commonly fall between 1.2 and 2.0 EC, with flowering ranges extending higher depending on strain and system. Your schedule should publish these numbers so you can measure against them.
Is a flush necessary at the end of a cannabis feed schedule? Most growers reduce or eliminate nutrients in the final one to two weeks. Whether it measurably changes final quality is debated, but it reliably reduces salt accumulation in the medium.
Can you use the same feed schedule for soil and hydro? No. Soil retains nutrients and buffers pH, while hydro delivers nutrients directly to the root zone. The same concentration will behave very differently in each.
How do you know if your cannabis feed schedule is too strong? Watch for burnt leaf tips, dark waxy foliage, clawing, and rising runoff EC. Any of these signals that the schedule needs to be dialed back at the current stage.
Are free cannabis feed charts reliable? Manufacturer charts are reliable as a baseline for their own product line, but they assume a fixed reservoir size and a fixed plant count. They're a starting point, not a personalized plan.
When should you start feeding cannabis seedlings? Seedlings carry enough stored energy for the first week or two. Most schedules begin light feeding once the first true leaves appear and the plant has established a root system.
Ready to stop guessing and start feeding to a plan built around your actual grow? Build your schedule at FeedSchedules and give your plants the stage-by-stage precision they've been missing.